Thread: Burger Tuning F90 M5 JB4 Power gains of up to 80whp and 100wtq!!
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      06-26-2018, 09:17 PM   #16
Dethsupp0rt
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Originally Posted by koko f90 View Post
Any one can answer?!
Terry was running 91 octane with a bit of E85 to get it up to 93-94 for those runs. AFR was pretty lean. For the 25 psi map, he's recommending racing fuel. 93 is OK for up to about 22 psi.
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